Combining three independent traceability chains for high-pressure gas flow in Germany

Jos van der Grinten, Bodo Mickan

Abstract

Currently all measurement capabilities for high-pressure gas flows in Germany are based on a single traceability chain. However, there are three primary standards available that can be made traceable without mutual dependencies. In this study PTB investigates the benefits of combining three independent traceability chains. The applied method is identical to the harmonization of the high-pressure cubic metre of natural gas [1]. For two G1000 transfer reference meters the measurement uncertainty decreases from 0.110% to 0.089%. For the working standards the CMCs decrease from 0.156% and 0.175% to 0.142% and 0.163% respectively. When only two chains are used the CMCs of the working standards improve with approximately 0.01%. More scenarios are explored. The development of a new primary standard with a CMC of 0.10% has the potential to improve the CMCs of the working standards with approximately 0.02%.

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IMEKO-TC9-2019-058.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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